JEE Chemistry Solved Question Paper 2017 | Previous Year Papers | Zigya

Subject

Chemistry

Class

JEE Class 12

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

Advertisement
1.

The electronic configuration of 59Pr ( praseodimium) is

  • [54Xe] 4f25d16s2

  • [54Xe] 4f15d16s2

  • [54Xe] 4f36s2

  • [54Xe] 4f35d2


2.

The bond lenght (pm) of F2, H2, Cl2 and I2, respectively is:

  • 144, 74, 199, 267

  • 74, 144, 199, 267

  • 74, 267, 199, 144

  • 144, 74, 267, 199


3.

How many emission spectral lines are possible when hydrogen atom is excited to nth energy level?

  • n(n+1)2

  • (n+1)2

  • (n-1)n2

  • n24


4.

Which of the following corresponds to the energy of the possible excited state of hydrogen?

  • -13.6 eV

  • 13.6 eV

  • -3.4 eV

  • 3.4 eV


Advertisement
5.

Which one of the following statement is correct for d4 ions [ P = pairing energy]

  • When Δ0 > P, low-spin complex form

  • When Δ0 < P, low-spin complex form

  • When Δ0 > P, high-spin complex form

  • When Δ0 > P, both high and low-spin complex form


6.

Commercially available H2SOis 98 g by H2SO4 and 2g by weight of water. It's density is 1.38 g cm-3. Calculate the molality (m) of  H2SO4 (molar mass of  H2SO4  is 98 g mol-1). 

  • 500 m

  • 20 molal

  • 50 m

  • 200 m


7.

Standard enthalpy (heat) of formation of liquid water at 25°C is around

 H2(g) + 12O2(g) → H2O (l)

  • -237 kJ/mol

  • 237 kJ/mol

  • - 286 kJ/mol

  • 286 kJ/mol


8.

The species having pyramidal shape according to VSEPR theory is

  • SO3

  • BrF3

  • SiO32-

  • OsF2


Advertisement
9.

Given ΔHf° for CO2(g) , CO(g) and H2O(g) are -393.5, -110.5 and -241.8 kJ mol-1, respectively. The ΔHf° [in kJ mol-1] for the reaction

CO2(g) + H2(g) → CO(g) + H2O (g) is

  • 524.1

  • -262.5

  • -417

  • 412


10.

Oxidation of cyclohexene in presence of acidic potassium permaganate leads to

  • glutaric acid

  • adipic acid

  • pimelic acid

  • succinic acid


Advertisement